package edu.nps.moves.dis7;

import java.io.*;

/**
 * This field shall specify information about a particular emitter system.
 * Section 6.2.23.
 *
 * Copyright (c) 2008-2016, MOVES Institute, Naval Postgraduate School. All
 * rights reserved. This work is licensed under the BSD open source license,
 * available at https://www.movesinstitute.org/licenses/bsd.html
 *
 * @author DMcG
 */
public class EmitterSystem extends Object implements Serializable {

    /**
     * Name of the emitter, 16 bit enumeration
     */
    protected int emitterName;

    /**
     * function of the emitter, 8 bit enumeration
     */
    protected short emitterFunction;

    /**
     * emitter ID, 8 bit enumeration
     */
    protected short emitterIDNumber;

    /**
     * Constructor
     */
    public EmitterSystem() {
    }

    public int getMarshalledSize() {
        int marshalSize = 0;

        marshalSize = marshalSize + 2;  // emitterName
        marshalSize = marshalSize + 1;  // emitterFunction
        marshalSize = marshalSize + 1;  // emitterIDNumber

        return marshalSize;
    }

    public void setEmitterName(int pEmitterName) {
        emitterName = pEmitterName;
    }

    public int getEmitterName() {
        return emitterName;
    }

    public void setEmitterFunction(short pEmitterFunction) {
        emitterFunction = pEmitterFunction;
    }

    public short getEmitterFunction() {
        return emitterFunction;
    }

    public void setEmitterIDNumber(short pEmitterIDNumber) {
        emitterIDNumber = pEmitterIDNumber;
    }

    public short getEmitterIDNumber() {
        return emitterIDNumber;
    }

    public void marshal(DataOutputStream dos) {
        try {
            dos.writeShort((short) emitterName);
            dos.writeByte((byte) emitterFunction);
            dos.writeByte((byte) emitterIDNumber);
        } // end try 
        catch (Exception e) {
            System.out.println(e);
        }
    } // end of marshal method

    public void unmarshal(DataInputStream dis) {
        try {
            emitterName = (int) dis.readUnsignedShort();
            emitterFunction = (short) dis.readUnsignedByte();
            emitterIDNumber = (short) dis.readUnsignedByte();
        } // end try 
        catch (Exception e) {
            System.out.println(e);
        }
    } // end of unmarshal method 

    /**
     * Packs a Pdu into the ByteBuffer.
     *
     * @throws java.nio.BufferOverflowException if buff is too small
     * @throws java.nio.ReadOnlyBufferException if buff is read only
     * @see java.nio.ByteBuffer
     * @param buff The ByteBuffer at the position to begin writing
     * @since ??
     */
    public void marshal(java.nio.ByteBuffer buff) {
        buff.putShort((short) emitterName);
        buff.put((byte) emitterFunction);
        buff.put((byte) emitterIDNumber);
    } // end of marshal method

    /**
     * Unpacks a Pdu from the underlying data.
     *
     * @throws java.nio.BufferUnderflowException if buff is too small
     * @see java.nio.ByteBuffer
     * @param buff The ByteBuffer at the position to begin reading
     * @since ??
     */
    public void unmarshal(java.nio.ByteBuffer buff) {
        emitterName = (int) (buff.getShort() & 0xFFFF);
        emitterFunction = (short) (buff.get() & 0xFF);
        emitterIDNumber = (short) (buff.get() & 0xFF);
    } // end of unmarshal method 


    /*
  * The equals method doesn't always work--mostly it works only on classes that consist only of primitives. Be careful.
     */
    @Override
    public boolean equals(Object obj) {

        if (this == obj) {
            return true;
        }

        if (obj == null) {
            return false;
        }

        if (getClass() != obj.getClass()) {
            return false;
        }

        return equalsImpl(obj);
    }

    /**
     * Compare all fields that contribute to the state, ignoring transient and
     * static fields, for <code>this</code> and the supplied object
     *
     * @param obj the object to compare to
     * @return true if the objects are equal, false otherwise.
     */
    public boolean equalsImpl(Object obj) {
        boolean ivarsEqual = true;

        if (!(obj instanceof EmitterSystem)) {
            return false;
        }

        final EmitterSystem rhs = (EmitterSystem) obj;

        if (!(emitterName == rhs.emitterName)) {
            ivarsEqual = false;
        }
        if (!(emitterFunction == rhs.emitterFunction)) {
            ivarsEqual = false;
        }
        if (!(emitterIDNumber == rhs.emitterIDNumber)) {
            ivarsEqual = false;
        }

        return ivarsEqual;
    }
} // end of class
